Katy Perry Dyes Her Hair Blue After Russell Brand Split

Katy Perry is still blue over her split from Russell Brand -- literally.

On Thursday, the 27-year-old pop star emerged for the first time since the British comic, 36, filed for divorce on December 30. Debuting a new blue hair color, Perry posed with a fan named Eric Berlanger on the set of an Adidas commercial in Santa Barbara, Calif.